private ushort[,] GetPixelsFrom12BitByteArray(byte[] bytes, ushort[,] prevFramePixels, GetByteMode byteMode, ref int idx, out bool crcOkay)
{
var rv = new ushort[Width, Height];
bool isLittleEndian = m_ImageSection.ByteOrder == AdvImageSection.ImageByteOrder.LittleEndian;
bool convertTo12Bit = this.m_ImageSection.BitsPerPixel == 12;
bool convertTo16Bit = this.m_ImageSection.BitsPerPixel == 16;
bool isKeyFrame = byteMode == GetByteMode.KeyFrameBytes;
bool keyFrameNotUsed = byteMode == GetByteMode.Normal;
bool isDiffCorrFrame = byteMode == GetByteMode.DiffCorrBytes;
int counter = 0;
for (int y = 0; y < Height; ++y)
{
for (int x = 0; x < Width; ++x)
{
counter++;
// Every 2 12-bit values can be encoded in 3 bytes
// xxxxxxxx|xxxxyyyy|yyyyyyy
switch (counter % 2)
{
case 1:
byte bt1 = bytes[idx];
idx++;
byte bt2 = bytes[idx];
ushort val = (ushort)(((ushort)bt1 << 4) + ((bt2 >> 4) & 0x0F));
if (!isLittleEndian)
{
val = (ushort)(val << 4);
val = (ushort)((ushort)((val & 0xFF) << 8) + (ushort)(val >> 8));
if (convertTo12Bit)
{
throw new NotSupportedException();
}
}
else
if (convertTo16Bit)
{
val = (ushort)(val << 4);
}
if (isDiffCorrFrame)
{
val = (ushort)((ushort)prevFramePixels[x, y] + (ushort)val);
if (convertTo12Bit && val > 4095)
{
val -= 4095;
}
}
rv[x, y] = val;
if (counter < 10 || counter > Height * Width - 10)
{
Trace.WriteLine(string.Format("{0}: {1}", counter, val));
}
break;
case 0:
bt1 = bytes[idx];
idx++;
bt2 = bytes[idx];
idx++;
val = (ushort)((((ushort)bt1 & 0x0F) << 8) + bt2);
if (!isLittleEndian)
{
val = (ushort)(val << 4);
val = (ushort)((ushort)((val & 0xFF) << 8) + (ushort)(val >> 8));
if (convertTo12Bit)
{
throw new NotSupportedException();
}
}
else
if (convertTo16Bit)
{
val = (ushort)(val << 4);
}
if (isDiffCorrFrame)
{
val = (ushort)((ushort)prevFramePixels[x, y] + (ushort)val);
if (convertTo12Bit && val > 4095)
{
val -= 4095;
}
}
rv[x, y] = val;
if (counter < 10 || counter > Height * Width - 10)
{
Trace.WriteLine(string.Format("{0}: {1}", counter, val));
}
break;
}
}
}
if (m_UsesCRC)
{
uint savedFrameCrc = (uint)(bytes[idx] + (bytes[idx + 1] << 8) + (bytes[idx + 2] << 16) + (bytes[idx + 3] << 24));
idx += 4;
uint crc3 = ComputePixelsCRC(rv);
crcOkay = crc3 == savedFrameCrc;
}
else
{
crcOkay = true;
}
return(rv);
}
private ushort[,] GetPixelsFrom12BitByteArray(byte[] bytes, ushort[,] prevFramePixels, GetByteMode byteMode, ref int idx, out bool crcOkay)
{
var rv = new ushort[Width, Height];
bool isLittleEndian = m_ImageSection.ByteOrder == AdvImageSection.ImageByteOrder.LittleEndian;
bool convertTo12Bit = this.m_ImageSection.BitsPerPixel == 12;
bool convertTo16Bit = this.m_ImageSection.BitsPerPixel == 16;
bool isKeyFrame = byteMode == GetByteMode.KeyFrameBytes;
bool keyFrameNotUsed = byteMode == GetByteMode.Normal;
bool isDiffCorrFrame = byteMode == GetByteMode.DiffCorrBytes;
int counter = 0;
for (int y = 0; y < Height; ++y)
{
for (int x = 0; x < Width; ++x)
{
counter++;
// Every 2 12-bit values can be encoded in 3 bytes
// xxxxxxxx|xxxxyyyy|yyyyyyy
switch (counter % 2)
{
case 1:
byte bt1 = bytes[idx];
idx++;
byte bt2 = bytes[idx];
ushort val = (ushort)(((ushort)bt1 << 4) + ((bt2 >> 4) & 0x0F));
if (!isLittleEndian)
{
val = (ushort)(val << 4);
val = (ushort)((ushort)((val & 0xFF) << 8) + (ushort)(val >> 8));
if (convertTo12Bit)
throw new NotSupportedException();
}
else
if (convertTo16Bit) val = (ushort)(val << 4);
if (isDiffCorrFrame)
{
val = (ushort)((ushort)prevFramePixels[x, y] + (ushort)val);
if (convertTo12Bit && val > 4095) val -= 4095;
}
rv[x, y] = val;
if (counter < 10 || counter > Height * Width - 10) Trace.WriteLine(string.Format("{0}: {1}", counter, val));
break;
case 0:
bt1 = bytes[idx];
idx++;
bt2 = bytes[idx];
idx++;
val = (ushort)((((ushort)bt1 & 0x0F) << 8) + bt2);
if (!isLittleEndian)
{
val = (ushort)(val << 4);
val = (ushort)((ushort)((val & 0xFF) << 8) + (ushort)(val >> 8));
if (convertTo12Bit)
throw new NotSupportedException();
}
else
if (convertTo16Bit) val = (ushort)(val << 4);
if (isDiffCorrFrame)
{
val = (ushort)((ushort)prevFramePixels[x, y] + (ushort)val);
if (convertTo12Bit && val > 4095) val -= 4095;
}
rv[x, y] = val;
if (counter < 10 || counter > Height * Width - 10) Trace.WriteLine(string.Format("{0}: {1}", counter, val));
break;
}
}
}
if (m_UsesCRC)
{
uint savedFrameCrc = (uint)(bytes[idx] + (bytes[idx + 1] << 8) + (bytes[idx + 2] << 16) + (bytes[idx + 3] << 24));
idx += 4;
uint crc3 = ComputePixelsCRC(rv);
crcOkay = crc3 == savedFrameCrc;
}
else
crcOkay = true;
return rv;
}
public object GetDataFromDataBytes(byte[] dataBytes, ushort[,] prevImageData, GetByteMode byteMode, int size, int startIndex)
{
byte[] bytes;
int readIndex = 0;
if (!m_UsesCompression)
{
bytes = dataBytes;
readIndex = startIndex;
}
else if (m_Compression == AdvCompressionMethods.COMPR_QUICKLZ)
{
byte[] compressedBytes = new byte[size];
Array.Copy(dataBytes, startIndex, compressedBytes, 0, size);
readIndex = 0;
bytes = QuickLZ.decompress(compressedBytes);
}
else if (m_Compression == AdvCompressionMethods.COMPR_LAGARITH16)
{
byte[] compressedBytes = new byte[size];
Array.Copy(dataBytes, startIndex, compressedBytes, 0, size);
readIndex = 0;
bytes = TangraCore.Lagarith16Decompress(Width, Height, compressedBytes);
}
else
{
throw new NotSupportedException(string.Format("Don't know how to apply compression '{0}'", m_Compression));
}
ushort[,] imageData;
bool crcOkay;
if (BitsPerPixel == 12)
{
imageData = GetPixelsFrom12BitByteArray(bytes, prevImageData, byteMode, ref readIndex, out crcOkay);
}
else if (BitsPerPixel == 16)
{
if (m_IsRawDataLayout)
{
imageData = GetPixelsFrom16BitByteArrayRawLayout(bytes, prevImageData, ref readIndex, out crcOkay);
}
else
{
imageData = GetPixelsFrom16BitByteArrayDiffCorrLayout(bytes, prevImageData, ref readIndex, out crcOkay);
}
}
else if (BitsPerPixel == 8)
{
if (m_IsRawDataLayout)
{
imageData = GetPixelsFrom8BitByteArrayRawLayout(bytes, prevImageData, ref readIndex, out crcOkay);
}
else
{
imageData = GetPixelsFrom8BitByteArrayDiffCorrLayout(bytes, prevImageData, ref readIndex, out crcOkay);
}
}
else
{
throw new NotSupportedException();
}
return(new AdvImageData()
{
ImageData = imageData,
CRCOkay = m_UsesCRC ? crcOkay : true,
Bpp = m_ImageSection.BitsPerPixel
});
}
public object GetDataFromDataBytes(byte[] dataBytes, ushort[,] prevImageData, GetByteMode byteMode, int size, int startIndex)
{
byte[] bytes;
int readIndex = 0;
if (!m_UsesCompression)
{
bytes = dataBytes;
readIndex = startIndex;
}
else if (m_Compression == AdvCompressionMethods.COMPR_DIFF_CORR_QUICKLZ)
{
byte[] compressedBytes = new byte[size];
Array.Copy(dataBytes, startIndex, compressedBytes, 0, size);
readIndex = 0;
bytes = QuickLZ.decompress(compressedBytes);
}
else
throw new NotSupportedException(string.Format("Don't know how to apply compression '{0}'", m_Compression));
ushort[,] imageData;
bool crcOkay;
if (BitsPerPixel == 12)
imageData = GetPixelsFrom12BitByteArray(bytes, prevImageData, byteMode, ref readIndex, out crcOkay);
else if (BitsPerPixel == 16)
{
if (m_IsRawDataLayout)
imageData = GetPixelsFrom16BitByteArrayRawLayout(bytes, prevImageData, ref readIndex, out crcOkay);
else
imageData = GetPixelsFrom16BitByteArrayDiffCorrLayout(bytes, prevImageData, ref readIndex, out crcOkay);
}
else if (BitsPerPixel == 8)
{
if (m_IsRawDataLayout)
imageData = GetPixelsFrom8BitByteArrayRawLayout(bytes, prevImageData, ref readIndex, out crcOkay);
else
imageData = GetPixelsFrom8BitByteArrayDiffCorrLayout(bytes, prevImageData, ref readIndex, out crcOkay);
}
else
throw new NotSupportedException();
return new AdvImageData()
{
ImageData = imageData,
CRCOkay = m_UsesCRC ? crcOkay : true,
Bpp = m_ImageSection.BitsPerPixel
};
}